독일에서 온 오포 93 리니어 파워 개조기

  얼마전 독일에서 연락와 리니어 파워 개조 기판과 부품을 보내 주었는데 상세한 답장을 보내왔습니다.  내용을 공개 해도 좋다는 말과 함께 .

 

Report on Jaehong's Linear Power Supply Kit from Manfred (Germany) :

 

I ordered the Linear PS as a Kit from Jeahong from Korea. I paid 152 Euros for the Kit incl. shipping and pay-pall cost.

Custom clearance and VAT in Germany did cost me an other 26 Euros. So in total it was 178,-Euros.

 

1. The Kit and Assembly:

 

The transaction was fast and I received a package which included:

 

1 huge, high quality Transformer 220V, with 2 secondary leads for 6V and 1 secondary lead for +/- 16V.

 

 

 

1 high quality PCB with good printings for all components.

  1 pack with all required parts, as caps, rectifiers, etc incl. mounting bolts and nuts.

 

I had received by mail upfront some pictures and guideline for the assembly. Together with the printing on the PCB it was easy to assemble the kit.

It took me approx. 2 hours to solder and mount all parts. I used Wondersolder and it was very easy to get good soldering joints.

I spend most time to make the caps "naked" and mark them all. If this sounds better, I do not know, but I do this on all my audio kits.

 

I tested the kit and the yellow LED came on, so this should be the basic check, that everything is done correct.

BTW, I should mention, that I do not connect the +/-15 Volt for the analog output, since I do not use them in the Oppo 93.

 

The mounting of the assembled LPS into the Oppo is not a big issue neither, it took me about an other half an hour to swob the power PCB.

In Germany we get the Oppo already supplied with a 3 prong power socket and earth/grounding connection is already done to the chassis.

However, I changed the power socket as well, since I got a 3 prong power inlet socket supplied with the kit from Jeahong.

 

So I could leave all removed parts in original status to re-assemble it back to original if wanted.

 

 

 

Comments:

The Linear Power supply is a non sophisticated, non high-end basic power supply with caps from a korean supplier (non high-end at least to my knowledge).

Therefor I was skeptical about the performance and was hesitating, if I should not replace the caps and rectifiers with better parts, such as Blackgate or Elma caps.

However, then I decided to build it just as Jeahong supplied it and give it a try.

The 2 separate 5V DC for the digital part to the Oppo are filtered/buffered each with 3 x 10.000uF/16V caps, this is really huge, isn't it?

 

 

2. Video and Audio performance:

 

Jeahong recommended to give the PS some hours of burn-in to settle the caps, which I did with a 4 days x 24hours continuous bluray operation in repeat modus.

 

Video:

(my components to validate are: JVC DLA X7 on 3 mtr wide screen, connected with Wireworld Ultraviolett 6 HDMI cable).

 

Picture quality improved, it seems to have more color and contrast, which probably is the result of less noise on the power supply.

The look is just more 3 dimensional, I think this is the best way to describe it. (I have not tested it with 3-D bluray).

 

Audio:

(I connect with a Wireworld Starlight 6 HDMI cable to an Anthem MRX700 (preamp only) which is feeding an Anthem P5 multichannel amp to a modded Klipsch 7.1 LS-System)

 

High frequency distortion is reduced, much less fatiguing now and lot easier to your ears.

Voice easier to understand.

Speakers are now disappearing better and sound space is more in the room.

 

At the beginning, I thought that bass has lost weight, but it is just less boomy and more precise.

I can turn up level now by 3 to 5 dB and still thinking it is lower volume then before the upgrade.

This is a clear indication, how much less stress is put on your ears with the LPS.

 

3. Summary:

 

The Kit is a no brainer for everybody who wants a cost effective upgrade for his Oppo 93.

It is easy to install (and to assemble if you can hold a solder iron).

The performance improvement is surprisingly big, especially when you compare it with the cost of "professional modders".

After the LPS in the Oppo 93, it is very difficult to listen to any SMPS equipped blu-ray player anymore, its just pain on your ears.